Update app.py

app.py

@@ -11,7 +11,7 @@ from bs4 import BeautifulSoup
 
 # --- LangChain core ---
 from langchain_core.documents import Document
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain.prompts import PromptTemplate
 
 # --- Loaders (files) ---